ATmega16U2 Atmel Corporation, ATmega16U2 Datasheet - Page 249

• Manufacturer Part Number: ATmega16U2
• Manufacturer: Atmel Corporation

Specifications of ATmega16U2

• Flash (kbytes): 16 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 22
• Ext Interrupts: 21
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 2
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 0.5
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 5
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

25.2.1
25.3
25.4
25.5
Table 25-7.
Table 25-8.
7799D–AVR–11/10
ATmega8U2
ATmega16U2
ATmega32U2
ATmega8U2
ATmega16U2
ATmega32U2
Device
Device
Signature Bytes
Calibration Byte
Page Size
Latching of Fuses
No. of Words in a Page and No. of Pages in the Flash
No. of Bytes in a Page and No. of Pages in the EEPROM
4K words (8Kbytes)
8K words (16Kbytes)
16K words (32Kbytes)
The fuse values are latched when the device enters programming mode and changes of the
fuse values will have no effect until the part leaves Programming mode. This does not apply to
the EESAVE Fuse which will take effect once it is programmed. The fuses are also latched on
Power-up in Normal mode.
All Atmel microcontrollers have a three-byte signature code which identifies the device. This
code can be read in both serial and parallel mode, also when the device is locked. The three
bytes reside in a separate address space. For the ATmega8U2/16U2/32U2 the signature bytes
are given in
Table 25-6.
The ATmega8U2/16U2/32U2 has a byte calibration value for the internal RC Oscillator. This
byte resides in the high byte of address 0x000 in the signature address space. During reset, this
byte is automatically written into the OSCCAL Register to ensure correct frequency of the cali-
brated RC Oscillator.
Part
ATmega8U2
ATmega16U2
ATmega32U2
EEPROM Size
Flash Size
256 bytes
512 bytes
1K bytes
Table
Device and JTAG ID
25-6.
0x000
0x1E
0x1E
0x1E
Signature Bytes Address
Page Size
32 words
64 words
64 words
Page Size
4 bytes
4 bytes
4 bytes
0x001
0x93
0x94
0x95
PCWORD
PCWORD
PC[4:0]
PC[5:0]
PC[5:0]
EEA[1:0]
EEA[1:0]
EEA[1:0]
0x002
0x89
0x89
0x8A
ATmega8U2/16U2/32U2
Pages
Part Number
No. of
No. of
Pages
128
128
256
128
128
256
958A
9389
9489
PCPAGE
PC[12:6]
PC[13:6]
PC[11:6]
PCPAGE
EEA[8:2]
EEA[8:2]
EEA[9:2]
JTAG
Manufacture ID
0x1F
0x1F
0x1F
EEAMSB
PCMSB
12
13
11
8
8
9
249